Bolt-anchor



J. E. OGDEN.

BOLT ANCHOR.

APPLICATION FTLED SW15, 1919.

Patented Jan. 18, 1921.

2 SHEETS-SHEET I.

J. E. OGDEN.

BOLT ANCHOR.

APPLICATION FILED SEPT. s, 1919.

1,365,945, Patented Jan. 18, 1921 2 SHEETSSHEET 2.

J4 J4 J4 N a; 544. 7 1 3% A C WW J 5% /ZMM UNITED STATES PATENT OFFICE.

BOLT-ANCHOR.

Specification of Letters Patent.

Patented an.'1 8 1921.

Application filed. September 5, 1919. Serial No. 321,739.

To all whom it may concern:

Be it known thatI, J OHN EDWARD OGDEN, a citizen of the United States of America, and a resident of Mountainville, town of Cornwall, Orange county, and State of New York, have invented certain new and useful Improvements in Bolt-Anchors, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof. I

This invention relates to bolt anchors of the general type disclosed in prior patents of mine, for instance, Patent No. 1,305,001 of May 27, 1919, in which the shell or shield is constructed of sheet metal. The objects of the present invention are to improve on such prior structures, particularly in regard to securing a more firm and positive gripping effect, to simplify the parts and reduce the cost.

Briefly the invention comprises a shield member which is made of sheet metal of substantially uniform thickness and of which the overall thickness is increased by means of integral corrugations or protuberanees offset from the body of the shell. Another feature of the invention is a special construction of expanding collars made also preferably of sheet metal and having tapering external ridges formed by corrugating the metal of the collars to provide wedges for expanding the shell.

These and other objects of the invention will appear in the following specification in whic I will describe the invention, the novel features of which will be set forth in ap ended claims.

Re erring to the drawings:

Figure 1 is a longitudinal sectional elevation of the complete bolt anchor, the section being taken on the line 1-1 of Fig. 2.

Fig. 2 is a similar sectional view at right angles to the plane of the Fig. 1, as on the line 2-2 of Fig. 1. i

Fig. 3 is a longitudinal elevation partly in section of the shell alone.

Fig. 4 is an end view of the'shell.

Fig. 5 is a transverse sectional view of the same, the section being taken on the line 5-5 of Fig. 3.

Fig. 6 is a top plan view of one of the expanding collars.

Fig. 7 is a bottom plan view of the same.

Figs. 8 and 9 are end views of the anchor illustrating the manner in which it expands.

Figs. 10 and 11 are similar views illustrating. the expansion of a threepart shield member. I

F 1g. 12 is a detail part sectional view of a shell having embossments of modified forms.

Fig. 13 is a longitudinal sectional view of another modification.

Fig. 14: is a cross sectional view of the same on substantially the plane of line 14-44. of Fig. 13.

Like characters of reference. designate correspondlng parts in all the drawings.

In the construction illustrated-in Figs. 1 to 9, the shell, which is shown as made of relatively heavy gage sheet metal, is formed 1n two parts or halves, 20, 21 shaped to provide the flaring open ends 22 to receive the externally tapered expanding collars 23, 24.

The embossments consist in this first form, of a series of outwardly pressed corrugations 25 providing external longitudinally extending ribs 26. These ribs substantially correspond in height to the largest diameter of the flaring mouth portions of the shell, as clearly shownin Figs. 1, 3 and 4 so that the structure is of substantially the same outside diameter throughout its length. These ribs furthermore, are preferably substantially rigid and noncollapsible under pressure, they being for this purpose preferably formed in the shape of self-Sustaining open arches as indicated in Fig. 1, capable of withstanding the compression forces to which they may be subjected in use. v

The expanding collars are shown also as constructed of sheet metal and formed each in a single piece. These collars are made with a substantially cylindrical internal bore or bolt passage and the outer taper is provided by means of integral outwardly pressed corrugations 27 which taper in height from the outer ends of the collar toward the inner ends of the same. These tapering ribs or corrugations also are formed to be self-sustaining and non-collapsible.

One of the collars, 24, is shown as interiorly screw threaded to act as a nut for the bolt, it being made of metal sufilciently heavy to take such threads.

From the structure thus far disclosed, it will be evident that when the anchor is inserted in its seat and the bolt turned into the nut, the two expanding devices will be drawn toward each other and by reason of their tapered construction will force apart the two sections of the shell, causing the external ribs or embossments on the shell parts to bite into and firmly engage the surrounding material. The open-arch or truss configuration of the ribs on both the shell and the collars gives them the strength necessary to resist collapse under pressure which will normally be applied.

To prevent turning of the collars while setting up the anchorage, I have shown the collars as provided with outwardly struck lugs 28 at their inner ends engaging inside the embossments formed in the shell. The interlocking engagement of the elements also prevents separation of the parts when the bolt is not in place, itbeing understood that the sections of the shell are normally held together by the well-known interlocking parts or by encircling springs.

Another novel feature of the expanding collar is the construction of the same with the ribs which are in line with the central portions of the shell segments, of greater height than the ribs at opposite sides of such ribs. Thesehigher ribs follow up the sections as they are expanded, as indicated particularly at 29 in Fig. 9, so that when the anchorage is fully expanded the pressure is equalized and borne by all the expanding ribs.

The structure disclosed in Figs. 10 and 11 is similar to the above, except that the shell in this case is made in three sections or s i ments, 30, 31 and 32. The operation, but for this matter of the division of the shell, is substantially the same as above oescribed.

I11 Fig. 12, I have illustrated how the embossments of the shell may be relatively short and may be disposed transversely. spirally or at various angles to the oi the shell. In this particular view, the embossments or protuberances are substantially star-shaped, the arms of the stars forming as many different anglesas may be desired. These embossments are all struck up from the general plane of the shellbut some oil them, 33, are shown as struck outwardly and others, 34:, as struck inwardly, the first in this case, forming anchorage elements for engagement with the surrounding material and the latter bearing on the bolt to brace and reinforce the shell.

In the construction illustrated in Figs. 13 and 14, all the embossments or ribs, 35, are

directed inwardly. With this construction.

when the bolt is tightened, the tapered collars 36, 37, as they are brought together and act as wedges by engagement with the inclined ends 38, of the ribs, spread or open up the shell on the line of longitudinal separation, indicated at 39. In the illustration the parts are shown held together by flanging the ends of the shell over shoulders provided on the collars, as indicated at 40.

hat I claim is:

1. In a bolt anchor, a longitudinally divided shell comprising a plurality of segments of substantially uniform thickness and provided with rigid embossments increasing the ov ll diameter oi the shell and expanding means engaged with said shell.

2. In a bolt anchor, a longitudinally divided shell, of substantially uniform thick ness and provided with embossmenls, said shell having outwardly flaring open ends and expanding devices engaged within said flaring open ends.

3. In a bolt anchor, a longitudinally divided shell of substantially uniform thickness and provided with eu'ibossments, and expanding collars engaged in the ends ol' said shell and provided with external loneJi tudinally disposed corrugations oi gradually reduced height.

l. In a belt anchor. a shell of subs-tut tially uniform thickness havingoutwardly flaring open ends and cmbossments her ween said ends substntially eorres;Minding in height to the greatest external diameter oi" the flaring ends, and expanding means engaged in said flaring ends.

5. In combination, a shell oi subs anl ially uniform thickness divided longitudinally into separate segments to provide for transverse expansion of the same, and an expanding collar engaged in the end of said shell and having portions of progressively increasing radii in line with parts oi the several segments intermediate the edges thereof.

6 In combination, a shell oi subshuitially u orm thickness divided hmgitiulinally ilno separate segments to provide for transverse expansion ot the same. and an expanding collar in the end oi said shell and having portions of progressively in reasing radii engaged with each o'l said segments.

7. In combination, a two-part shell of substantially uniform thickness divided longitudinally into separate halves to provide for transverse expansion oi the same. an expanding collar engaged in the end of said shell having its outer side substantially parallel. with its axis in one plane but tapered on lines away from said plane and disposed with said plane in line with the line oi. separation between the halves.

8. In combination, a shell oil? sul. stantially uni form thickness divided into separate segments to provide tor trans verse expansion oi the same, and expanding collars engaged in the ends oi said shell, said collars having portions of progressively increasing radii substantially in line with portions of the several segments intcrmei diate the edges thereof and one oil said collars being provided with screw threads.

9. In combination, a shell of substantially uniform thickness divided longitudimilly into separate segments to provide for translougiiudinallv llll) lild verse expansion of the same, and an expand ing collar engaged in the end of said shell having external longitudinal corrugations decreasing in height from the outer toward the inner end of the collar.

10. In combination, a shell of substantially uniform thickness divided longitudinally into separate segments to provide for transverse expansion of the same, an expanding collar engaged in the end of said shell having external longitudinal corrugations decreasing in height from the outer toward the inner end of the collar to rovide wedging ridges and having the ri ges which are in line with the more central portions of the segments of greater height than the remain ing ridges.

11. As an article of manufacture, an expanding device for bolt anchors comprising a one-piece sheet metal collar having a substantiall cylindrical bod provided with outward y corrugated ri ges tapering in height from one end toward the other end of the collar with two diametrically opposite ridges of greater height than the others.

12.'In a bolt anchor, a tubular shell having an external embossment near one end thereof and an expanding collar engaged in said end of the shell and rovided with a lug engaging inside the em ossment to hold the collar within the shell and against turning in the shell.

13. In a bolt anchor, a substantially rigid sheet metal shield of substantially uniform thickness divided longitudinally into seg ments, said segments having relatively rigld upstanding embossments and the shield having outwardly flaring open ends, expanding devices engaged in said open ends of the shield and consisting each of a oneiece sheet metal collar having a substantially cylindrical body and outwardly corrugated ridges tapering in height from one end toward the other end of the collar to fit the flaring ends of the shield, said collars having outwardly projecting portions near their inner ends engaging the shield within said embossments.

14:. In a bolt anchor, a substantially rigid sheet metal shield of substantially uniform thickness divided longitudinally into segments having relatively rigid upstanding embossments and the shield having outwardly flaring open ends, expanding devices engaged in said open ends of the shield and consisting each of a one-piece sheet metal collar having a substantially cylindrical body and outwardly corrugated ridges tapering in height from one end toward the other end of the collar to fit the flaring ends of the shield and the ridges which are in line with the more central portions of the segments being of greater height than the ridges at the sides thereof to equalize the pressure on the shield after expansion of the same.

15. An expansion bolt shield comprising a substantially rigid sheet metal shell of substantially uniform thickness divided longitudinally and provided with external upstanding embossments, the shield having outwardly flaring open ends and said embossments decreasing in height as they approach said flaring ends.

16. An expansion bolt shield comprising a substantially rigid sheet metal shell of substantially uniform thickness divided longitudinally and provided with external upstanding embossments having parts extending longitudinally and parts extending transversely of the shield.

17. In a bolt anchor, a longitudinally divided shell having outwardly flaring end members and expanding members engaged therewith, certain of said members having corrugated portions engaging the members and cooperating therewith.

In witness whereof I hereunto set my hand this 22nd da of Au ust, 1919.

JOH EDWA D OGDEN.

Witness:

I. B. Moon. 

